GsM Arena checked out the new W900 Walkman music phone from SE, here's a short quote from their full review:

Naturally, the successful Walkman-mobile W800i was followed by a new model - W550, which was a little bit cheaper at the expense of certain technological equipment. Sony Ericsson W550 attracted customers with both its top-class MP3 player and its swivel construction. The last Sony Ericsson model from the Walkman line so far is the W900 model, in which the manufacturer has apparently tried to install everything techno fans long for.



Link: GSM Arena